Answer:
MgI₂
MgO
PbI₄
PbO₂
Explanation:
Binary compounds are formed when a cation combines with an anion. Such compounds are also known as ionic compounds.
The four binary compounds that can be formed are as follows:
Mg²⁺ I⁻
When writing the empirical formula the charge of the anion is written as the subscript of the cation, and the charge of the cation is written as the as script of the anion, such as
Mg₁I₂ or MgI₂
Mg²⁺ O²⁻
Mg₂O₂ or MgO
Pb⁴⁺ I⁻
Pb₁I₄ or PbI₄
Pb⁴⁺ O²⁻
Pb₂O₄ or PbO₂
